/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.transport.sslHttpBase;

import java.io.IOException;
import java.util.Date;

import cgl.narada.transport.util.BytesUtil;

/**
 * The link keep alive message.
 * @author John Yin
 */

public class LinkMessageKeepAlive extends LinkMessage {

    public static final byte TRANSPORT_KEEPALIVE_TYPE = 1;

    private long m_keepAliveCreationTime = System.currentTimeMillis();

    /**
     * --------------------------------------------------------------
     */
    public LinkMessageKeepAlive() {
        setMessageType(TRANSPORT_KEEPALIVE_TYPE);
    }

    /**
     * --------------------------------------------------------------
     */
    public LinkMessageKeepAlive(String channelID) {
        super(channelID);
        setMessageType(TRANSPORT_KEEPALIVE_TYPE);
    }

    /**
     * --------------------------------------------------------------
     */
    public long getKeepAliveCreationTime() {
        return m_keepAliveCreationTime;
    }

    /**
     * --------------------------------------------------------------
     */
    public byte[] toBytes() {
        constructMessage();
        byte[] bytes = super.toBytes();
        return bytes;
    }

    /**
     * --------------------------------------------------------------
     * Construct the keep alive message with
     */
    private void constructMessage() {
        byte[] payload = BytesUtil.longToBytes(m_keepAliveCreationTime);
        setPayload(payload);
    }

    /**
     * --------------------------------------------------------------
     */
    public void parseData(byte[] payload) throws IOException {
        super.parseData(payload);
        m_keepAliveCreationTime = BytesUtil.bytesToLong(getPayload());
    }

    /**
     * --------------------------------------------------------------
     * Unit Testing.
     */
    public static void main(String[] args) throws IOException {
        LinkMessage msrc = new LinkMessageKeepAlive("helloworld");
        msrc.setMessageType(TRANSPORT_KEEPALIVE_TYPE);
        LinkMessage mdst = new LinkMessageKeepAlive();
        mdst.parseData(msrc.toBytes());

        if (!mdst.getLinkID().equals("helloworld")) {
            System.out.println("===Invalid channel id");
        }

        if ((msrc.getMessageType() != TRANSPORT_KEEPALIVE_TYPE) ||
            (mdst.getMessageType() != TRANSPORT_KEEPALIVE_TYPE)) {
            System.out.println("===Error in message type: "+msrc.getMessageType());
        }

        System.out.println("Completed...KeepAlive created: "+new Date(((LinkMessageKeepAlive)mdst).getKeepAliveCreationTime()));
    }

}
